A Flat Rectangular Loop of Wire Is Placed Between the Poles

question 132

Multiple Choice

A flat rectangular loop of wire is placed between the poles of a magnet, as shown in the figure. It has dimensions $w = 0.60 \mathrm {~m}$ and $L = 1.0 \mathrm {~m}$ , and carries a current $I = 2.0 \mathrm {~A}$ in the direction shown. The magnetic field due to the magnet is uniform and of magnitude $0.80 \mathrm {~T}$ . The loop rotates in the magnetic field and at one point the plane of the loop is parallel to the field. At that instant, what is the magnitude of the torque acting on the wire due to the magnetic field?

• A) \(0.96 \mathrm {~N} \cdot \mathrm { m }\)
• B) \(0.48 \mathrm {~N} \cdot \mathrm { m }\)
• C) \(0.40 \mathrm {~N} \cdot \mathrm { m }\)
• D) \(0.83 \mathrm {~N} \cdot \mathrm { m }\)
• E) \(0.00 \mathrm {~N} \cdot \mathrm { m }\)

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Definitions:

Wide-area

A term typically used in networking to describe a network that covers a large geographic area, such as a city, country, or even intercontinental distances, often referred to as a WAN (Wide Area Network).

Wireless Network

A computer network that uses wireless data connections between network nodes, enabling devices to connect to the internet without physical wires.

First Generation

Referring to the earliest stage or version of a product, technology, or system, often characterized by being the initial attempt or introductory iteration.

Mobile Networks

Wireless communication networks that enable devices to connect to the internet and communicate with each other without fixed connections.